The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 2009
Filed:
Mar. 08, 2006
Joseph A. Wilson, Royal Oak, MI (US);
Michael J. Halsig, Warren, MI (US);
John W. Duddles, Clarkston, MI (US);
Hal E. Pringle, Bloomfield, MI (US);
Joseph A. Wilson, Royal Oak, MI (US);
Michael J. Halsig, Warren, MI (US);
John W. Duddles, Clarkston, MI (US);
Hal E. Pringle, Bloomfield, MI (US);
BorgWarner Inc., Auburn Hills, MI (US);
Abstract
During normal operation of diesel engines the EGR valve poppet often becomes stuck to the valve seat in the closed position, due to excessive build up of exhaust gas debris, which renders the valve inoperable. This usually occurs after the engine is shut down and the valve is seated. Features, which locate the valve poppet in an unseated position when not in use, are implemented into the EGR valve design to prevent this sticking from occurring, thereby increasing product robustness and prolonging product life.